CN109523921B - Flexible display panel and display device - Google Patents
Flexible display panel and display device Download PDFInfo
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- CN109523921B CN109523921B CN201811517836.3A CN201811517836A CN109523921B CN 109523921 B CN109523921 B CN 109523921B CN 201811517836 A CN201811517836 A CN 201811517836A CN 109523921 B CN109523921 B CN 109523921B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K77/00—Constructional details of devices covered by this subclass and not covered by groups H10K10/80, H10K30/80, H10K50/80 or H10K59/80
- H10K77/10—Substrates, e.g. flexible substrates
- H10K77/111—Flexible substrates
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/562—Protection against mechanical damage
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K10/00—Organic devices specially adapted for rectifying, amplifying, oscillating or switching; Organic capacitors or resistors having a potential-jump barrier or a surface barrier
- H10K10/80—Constructional details
- H10K10/88—Passivation; Containers; Encapsulations
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2102/00—Constructional details relating to the organic devices covered by this subclass
- H10K2102/301—Details of OLEDs
- H10K2102/311—Flexible OLED
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/30—Devices specially adapted for multicolour light emission
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Abstract
The invention describes a flexible display panel and a display device. A flexible display panel comprising: a flexible substrate; the array layer is positioned on the flexible substrate; the display layer is positioned on one side of the array layer, which is far away from the flexible substrate, and comprises a plurality of light-emitting devices; the shielding film is positioned on one side of the flexible substrate, which is far away from the array layer; the flexible display panel comprises a bendable area, and the shielding film is provided with a plurality of hollow parts at least in the bendable area. The invention can relieve the bending stress of the shielding film when the flexible display panel is bent, thereby avoiding the flexible display panel from generating creases in a bending area and ensuring the reliability of the performance of the flexible display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible display panel and a display device.
Background
In the conventional display device technology, the display panel is mainly divided into two mainstream technologies, namely a liquid crystal display panel and an organic light emitting display panel. The liquid crystal display panel forms an electric field capable of controlling the deflection of liquid crystal molecules by applying voltage to two ends of the liquid crystal molecules, so that the transmission of light rays is controlled to realize the display function of the display panel; the organic light-emitting display panel adopts an organic electroluminescent material, and when current passes through the organic electroluminescent material, the luminescent material can emit light, so that the display function of the display panel is realized.
The organic light emitting display panel has advantages of self-luminescence, ultra-thinness, high contrast, ultra-wide viewing angle, low power consumption, high display brightness, bright color, and capability of manufacturing flexible display, and the like, and is a key point of attention.
Flexible display panels are flexible display devices made of flexible materials, have advantages of small size, portability, low power consumption, and the like, and are increasingly used in various fields.
Generally, a flexible material used in a flexible display panel has a certain bending strength, and when the bending strength exceeds the bending strength of the flexible material, the flexible display panel may be irreversibly deformed, such as a crease, which affects the appearance and use of the flexible display panel. In practical applications, it is desirable that the flexible display panel has good flexing characteristics, and that devices inside the flexible display panel are not affected by bending, folding, stretching, etc., thereby causing device failure. Thus, it is a pressing need of the flexible display panel to be able to have relatively free folded, bent and stretched states, thereby achieving protection of internal devices.
Disclosure of Invention
In view of this, the present invention provides a flexible display panel, which has a good bending characteristic, and can protect internal devices of the flexible display panel from being damaged by bending, so as to solve the technical problem of improving performance reliability.
In a first aspect, the present invention provides a flexible display panel comprising:
a flexible substrate;
the array layer is positioned on the flexible substrate;
the display layer is positioned on one side of the array layer, which is far away from the flexible substrate, and comprises a plurality of light-emitting devices;
the shielding film is positioned on one side of the flexible substrate, which is far away from the array layer;
the flexible display panel comprises a bendable area, and at least the shielding film in the bendable area is provided with a plurality of hollow parts.
Optionally, the thickness of the shielding film is between 100 μm and 1 mm.
Optionally, the shape of the hollowed-out portion of the shielding film includes at least one of a diamond shape, a hexagonal shape, a circular shape, or an elliptical shape.
Optionally, the size of the hollowed-out portion of the shielding film is between 0.1mm and 1 cm.
Optionally, the flexible display panel is a stretchable display panel.
Optionally, the shielding film is a mesh shielding film.
Alternatively, the mesh-shaped shielding film has a single individual stretching direction, and the shielding film has a unidirectional individual stretching pattern along the stretching direction.
Optionally, the mesh shielding film has two separate stretching directions, a first stretching direction and a second stretching direction; the first stretching direction is perpendicular to the second stretching direction. The mesh-like shielding film has a first unidirectional individual stretch pattern along a first stretch direction; the mesh-like shielding film has a second unidirectional individual stretch pattern along a second stretch direction.
Optionally, the material of the shielding film includes any one or more of copper, silver, aluminum, or iron.
Optionally, the flexible display panel further includes an adhesive layer; the adhesive layer is located between the shielding film and the flexible substrate.
Optionally, the adhesive layer is a PET grid double-sided adhesive or an optical adhesive.
Optionally, the flexible display panel further includes a flexible packaging structure; the flexible packaging structure is located on one side, far away from the array layer, of the display layer.
Based on the same inventive concept, in a second aspect, the invention further provides a display device, which includes any one of the flexible display panels provided by the invention.
Compared with the prior art, the flexible display panel and the display device provided by the invention at least realize the following beneficial effects:
in the flexible display panel provided by the invention, the shielding film is arranged on one side of the flexible substrate, the shielding film is mainly used for preventing the electromagnetic signal interference of the outside to the interior of the flexible display panel, and the shielding film is provided with a plurality of hollow parts at least in the bendable region of the flexible display panel. Compared with the traditional non-hollow whole-face shielding film, the shielding film provided by the invention can ensure that the shielding film has certain bending resistance when the flexible display panel is in a bending state, the area of the shielding film can be easily changed, and creases are not easily generated, so that the flexible display panel has better bending resistance. The invention can prevent the stress concentration borne by the whole shielding film when the flexible display panel is bent, thereby avoiding the generation of creases in a bending area and ensuring the reliability of the performance of the flexible display panel. In addition, the bending resistance and the flexibility of the shielding film are improved, the damage of bending force to the flexible display panel can be relieved, the peeling phenomenon between the film layers of the flexible display panel can be prevented under the condition that the shielding film shields electromagnetic signals, the crease phenomenon of a bending area is improved, and the flexibility of the flexible display panel is integrally improved.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic view illustrating a flexible display panel in a bent state in the prior art;
fig. 2 is a schematic top view of a flexible display panel according to an embodiment of the present invention, as viewed from a direction of a shielding film;
FIG. 3 is a view of the flexible display panel shown in FIG. 2 along AA1A schematic cross-sectional view of;
fig. 4 is a schematic view of a bent state of the flexible display panel shown in fig. 3;
FIG. 5 is a schematic diagram of a shielding film pattern of another alternative implementation of a flexible display panel provided by an embodiment of the invention;
FIG. 6 is a schematic diagram of a shielding film pattern of another alternative implementation of a flexible display panel provided by an embodiment of the invention;
FIG. 7 is a schematic diagram of a shielding film pattern of another alternative implementation of a flexible display panel provided by an embodiment of the invention;
FIG. 8 is a schematic diagram of a shielding film pattern of another alternative implementation of a flexible display panel provided by an embodiment of the present invention;
fig. 9 is a schematic diagram of a display device according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Among the prior art, the barrier film is a monoblock sheetmetal, because the ductility of the metal level of whole piece is relatively poor, resistant buckling performance is relatively weak, leads to flexible display panel when the state of buckling, and the regional stress concentration of buckling leads to flexible display panel to appear the crease, and flexible display panel is buckling regional inside the emergence protruding phenomenon promptly, influences flexible display panel's stability. Fig. 1 is a schematic view of a whole shielding film in a folded state in the prior art. As shown in fig. 1, the shielding film 70 is disposed on one side of the flexible display panel through an adhesive layer 80. When the flexible display panel is in a bent state, the protrusion 60 appears at the bent region, which causes a crease to appear in the bent region of the flexible display panel 90, thereby causing a risk of a broken line in the flexible display panel and a risk of peeling off a film layer, and further affecting the stability of the flexible display panel.
In order to solve the above problems, the present invention provides a flexible display panel, which includes a shielding film having a hollow portion, and the shielding film has a protection effect on the interior of the flexible display panel from electromagnetic signals without affecting the protection effect of the shielding film, and the ductility and bending resistance of the shielding film are ensured, so that the flexible display panel is prevented from generating creases in a bending region, the peeling phenomenon between the film layers of the flexible display panel can be prevented, and the reliability of the performance of the flexible display panel is ensured.
Fig. 2 is a schematic view of a flexible display panel according to an embodiment of the present invention, as viewed from a direction of a shielding film. FIG. 3 is a view of the flexible display panel along AA in FIG. 21Is shown schematically in cross-section. Fig. 4 is a schematic view of the flexible display panel shown in fig. 3 in a bent state.
As shown in fig. 3, the flexible display panel includes: a flexible substrate 100; an array layer 101 located on the flexible substrate 100; a display layer 102 located on a side of the array layer 101 away from the flexible substrate 100, where the display layer 102 includes a non-light-emitting region 1021 and a plurality of light-emitting devices 1022, and optionally, the light-emitting devices 1022 may be organic light-emitting devices including an anode, a light-emitting layer, and a cathode; the shielding film 200 is positioned on one side of the flexible substrate, which is far away from the array layer 101; and an adhesive layer 300 between the shielding film 200 and the flexible substrate 100.
The flexible display panel includes a bendable region BA, optionally, the bendable region BA may be a partial region of the flexible display panel, or the entire surface of the flexible display panel is bendable, and the shielding film 200 has a plurality of hollow portions 201 at least in the bendable region BA; that is, the shielding film 200 in the flexible display panel provided by the present invention may have a plurality of hollow portions 201 only in the bendable region BA, or may also have a hollow portion 201 in the non-bendable region NBA of the flexible display panel. Compared with the prior art, the flexible display panel provided by the invention has the advantages that the shielding film has good ductility and bending resistance, so that the display panel is prevented from generating creases in a bending area, the peeling phenomenon between the film layers of the flexible display panel can be prevented, and the reliability of the performance of the flexible display panel is ensured.
Fig. 2 is a schematic top view of an alternative implementation of a flexible display panel according to an embodiment of the present invention from the direction of a shielding film. As shown in fig. 2, the flexible display panel includes a bendable region BA and a non-bendable region NBA, and optionally, the bendable region BA may be a partial region of the flexible display panel, or the entire surface of the flexible display panel may be bendable. The shielding film 200 of the flexible display panel has a plurality of hollowed-out portions 201 at least in the bendable area BA; that is, the shielding film 200 in the flexible display panel of the present invention may have a plurality of hollow portions 201 only in the bending area BA, or may have a hollow portion 201 in the non-bending area NBA of the flexible display panel.
Fig. 4 is a schematic view of the flexible display panel shown in fig. 3 in a bent state. As shown in fig. 4, the shielding film 200 in the flexible display panel is located on the side of the flexible substrate away from the array layer 101; the BA shielding film at least in the bendable area is provided with a plurality of hollow parts 201; that is, the shielding film 200 in the flexible display panel provided by the present invention may have a plurality of hollow portions 201 only in the bendable region BA, or may also have a hollow portion 201 in the non-bendable region NBA of the flexible display panel. Compared with the prior art, in the flexible display panel provided by the invention, the shielding film 200 at least has the plurality of hollowed-out parts 201 in the bendable region, and in the bending state shown in fig. 4, the hollowed-out parts 201 can deform to a certain extent after being subjected to the action of an external force and can transmit the acting force applied to the hollowed-out parts, so that the bending stress can be prevented from being excessively concentrated, the ductility of the shielding film can be enhanced, the bending resistance can be improved, the phenomenon of crease generation of the flexible display panel can be avoided, the shielding film can be ensured to shield electromagnetic signal interference, the peeling phenomenon between the flexible display panel film layers can be prevented, and the reliability of the performance of the flexible display panel can be ensured.
With continued reference to FIGS. 3 and 4, the thickness of the shielding film 200 in the flexible display panel provided by the present invention is d, and optionally, the thickness d of the shielding film 200 is between 100 μm and 1mm, i.e., 100 μm ≦ d ≦ 1 mm. When the thickness d of the shielding film 200 is less than 100 μm, the electromagnetic shielding effect of the shielding film 200 is reduced, affecting the electromagnetic shielding effect of the shielding film 200; when the thickness d of the shielding film 200 is greater than 1mm, the thickness d of the shielding film 200 is too large, which is not favorable for bending the flexible display panel and affects the bending reliability of the flexible display panel.
Optionally, in the flexible display panel provided by the present invention, the hollow portion 201 of the shielding film 200 may have any shape, including at least one or a combination of a diamond shape, a hexagon shape, a circle shape, or an ellipse shape. Flexible display panel is under the state of buckling, and fretwork portion 201 can have certain deformation after receiving the exogenic action, can transmit the effort that its self received to can alleviate the stress of buckling, avoid stress concentration and improve flexible display panel crease phenomenon, strengthen flexible display panel's reliability. The hollow-out portions 201 of the shielding films 200 in the flexible display panels in fig. 2, 3 and 4 are all exemplified by circular hollow-out portions. It should be noted that the shape of the hollow-out portion 201 is not limited in any way, and may be at least one or a combination of a diamond shape, a hexagon shape, a circle shape, an oval shape, or any other arbitrary shape.
Optionally, in the flexible display panel provided by the present invention, the size of the hollow portion 201 of the shielding film 200 is between 0.1mm and 1 cm. When the size of the hollow portion 201 of the shielding film 200 is too small, and the flexible display panel is in a bent state, the deformation amount of the hollow portion 201 of the shielding film 200 after being subjected to the external force is small, the transmission capability of the transmission is weak, and the bending stress cannot be relieved, so that the crease phenomenon of the flexible display panel cannot be improved. When the size of the hollow portion 201 of the shielding film 200 is greater than 1cm, the electromagnetic shielding effect of the shielding film 200 on the flexible display panel is reduced, which affects the electromagnetic shielding function of the shielding film 200. In the flexible display panel provided by the invention, the size of the hollow part 201 of the shielding film 200 is between 0.1mm and 1cm, and within the range, the shielding film 200 can ensure the electromagnetic shielding function, and can also ensure that the shielding film avoids stress concentration in a bending state, thereby enhancing the reliability of the flexible display panel.
Optionally, the flexible display panel provided by the invention is a stretchable display panel. Flexible display panels may be bent or folded to achieve a desired shape, while stretchable display panels are characterized by being stretchable, and in some cases may be stretched in at least one direction.
Based on the same inventive concept, fig. 5 is a schematic diagram of a shielding film pattern of another alternative implementation of the flexible display panel according to the embodiment of the present invention. Optionally, in the flexible display panel provided by the present invention, the shielding film 200 is a mesh shielding film. As shown in fig. 5, the shielding film 200 is a mesh-like shielding film having two directions of independent stretching in the X direction and the Y direction; wherein the X-direction and the Y-direction are perpendicular to each other. The reticular shielding film can be independently stretched in the X direction and the Y direction, and can relieve the tensile stress concentration in the X direction during the stretching in the X direction, so that the reliability of the flexible display panel is enhanced. Meanwhile, stretching in the X direction does not affect stretching in the Y direction or has little effect. Similarly, when the flexible display panel is stretched in the Y direction, the tensile stress concentration in the Y direction can be relieved, and the reliability of the flexible display panel is enhanced. Meanwhile, stretching in the Y direction does not affect stretching in the X direction or has little effect.
With continued reference to fig. 5, the mesh-shaped shielding film in the flexible display panel according to the embodiment of the present invention can be stretched in the X direction and the Y direction separately, and the mesh-shaped shielding film in the X direction has an X-direction separate stretching pattern and the mesh-shaped shielding film in the Y direction has a Y-direction separate stretching pattern. As shown in fig. 5, the mesh-like shielding film includes an individual stretched pattern 2001 in the X direction and an individual stretched pattern 2002 in the Y direction. The individual stretched pattern 2001 in the X direction is a "zigzag" pattern in the X direction by one piece, and the individual stretched pattern 2002 in the Y direction is a "zigzag" pattern 20021 in one piece in the Y direction, in which a plurality of the small pieces of the "zigzag" pattern 20021 are repeatedly arranged in the X direction. The individual stretched patterns 2001 in the X direction and the individual stretched patterns 2002 in the Y direction are alternately arranged in the Y direction and connected to constitute a pattern of the mesh-like shielding film. When the X direction stretches, the X direction independently stretches the pattern, so that the external stress is relieved through the deformation of the pattern 2001, the phenomenon that the flexible display panel is creased due to stress concentration is avoided, and the reliability of the flexible display panel is enhanced. Meanwhile, stretching in the X direction does not affect the Y-direction individual stretched pattern 2002, or has little effect, i.e., the Y-direction individual stretched pattern 2002 is deformed by less than 10%. Similarly, when stretching in the Y direction, the Y-direction single stretching pattern 2002 relieves the external stress through the deformation of the pattern itself, avoids the stress concentration from causing the flexible display panel to have a crease, and enhances the reliability of the flexible display panel. Meanwhile, the stretching in the Y direction does not affect the individual stretched pattern 2001 in the X direction, or the effect is small, that is, the individual stretched pattern 2001 in the X direction is deformed by less than 10%. Compared with a common netted shielding film, the netted shielding film with two independent stretching directions provided by the embodiment has more excellent bending and stretching effects, the extensibility, the contractibility and the bending resistance of the netted shielding film are improved, the shielding film is stretched independently in one direction without influencing the performance of the flexible display panel in the other direction, and the flexible display panel has better stability. Moreover, the flexible display panel provided by the embodiment has the mesh shielding films in two independent stretching directions, and has the capability of relieving bending stress of the shielding film pattern on the basis of the mesh shielding film material corresponding to tensile deformation, so that the reliability of the flexible display panel is improved. Optionally, the mesh shielding film is disposed at least in the bendable region BA, and the non-bendable region NBA shielding film is not limited.
Optionally, in the shielding film in the flexible display panel provided in the embodiment of the present invention, the net-shaped shielding film has separate stretching patterns in the X direction and the Y direction, the separate stretching pattern in the X direction is the same as the separate stretching pattern in the Y direction, or the separate stretching pattern in the X direction is different from the separate stretching pattern in the Y direction.
Fig. 6 is a schematic diagram of a shielding film pattern according to another alternative embodiment of the present invention. The shielding film is a mesh-like shielding film as shown in fig. 6. The mesh-like shielding film can be stretched independently in the X-direction and the Y-direction, and has an X-direction independent stretch pattern and a Y-direction independent stretch pattern. As shown in fig. 6, the mesh-like shielding film includes an individual stretched pattern 2003 in the X direction and an individual stretched pattern 2004 in the Y direction. The individual stretched pattern in the X direction is a "lantern" pattern that is full in the X direction, and the individual stretched pattern in the Y direction 2004 is a "lantern" pattern that is full in the Y direction. The X-direction individual stretched pattern 2003 and the Y-direction individual stretched pattern 2004 are repeatedly arranged in the Y-direction and the X-direction, respectively, and the X-direction individual stretched pattern 2003 intersects the Y-direction individual stretched pattern 2004 with an intersecting pattern K1, wherein the intersecting pattern K1 does not intersect with both the X-direction "lantern" pattern and the Y-direction "lantern" pattern, and has a hollowed-out shape in K1. When stretching in the X direction, the X-direction independent stretching pattern 2003 relieves the external stress through the deformation of the pattern, avoids the crease of the flexible display panel caused by stress concentration, and enhances the reliability of the flexible display panel. Meanwhile, the stretching in the X direction does not affect the individual stretched pattern 2004 in the Y direction, or the effect is small, that is, the amount of deformation of the individual stretched pattern 2004 in the Y direction is small. Similarly, when stretching in the Y direction, the Y-direction single stretching pattern 2004 relieves the external stress through the deformation of the pattern itself, avoids the stress concentration from causing the flexible display panel to have a crease, and enhances the reliability of the flexible display panel. Meanwhile, the stretching in the Y direction does not affect the individual stretched pattern 2003 in the X direction, or the effect is small, that is, the amount of deformation of the individual stretched pattern 2003 in the X direction is small. Compared with a common netted shielding film, the netted shielding film with two independent stretching directions provided by the embodiment has more excellent bending and stretching effects, the extensibility, the contractibility and the bending resistance of the netted shielding film are improved, the shielding film is stretched independently in one direction without influencing the performance of the flexible display panel in the other direction, and the flexible display panel has better stability. Moreover, the flexible display panel provided by the embodiment has the mesh shielding films in two independent stretching directions, and has the capability of relieving bending stress of the shielding film pattern on the basis of the mesh shielding film material corresponding to tensile deformation, so that the reliability of the flexible display panel is improved. In addition, compared with the previous embodiment, the shielding film of the flexible display panel provided by the embodiment can ensure the etching uniformity in the aspect of process preparation. It should be noted that, the shielding film in the flexible display panel provided by the present invention may be formed by etching the shielding film to form a hollow portion after the shielding film is manufactured on the whole surface, or may be formed by imprinting a pattern, and the method for manufacturing the shielding film is not limited.
Fig. 7 is a schematic diagram of a shielding film pattern according to another alternative embodiment of the present invention. The shielding film is a mesh-like shielding film as shown in fig. 7. The mesh-like shielding film can be stretched independently in the X-direction and the Y-direction, and has an X-direction independent stretch pattern and a Y-direction independent stretch pattern. As shown in fig. 7, the mesh-type shielding film includes an individual stretched pattern 2005 in the X direction and an individual stretched pattern 2006 in the Y direction. The individual stretched pattern in the X direction is a "lantern" pattern that is full in the X direction, and the individual stretched pattern in the Y direction 2006 is a "lantern" pattern that is full in the Y direction. The X-direction individual stretched pattern 2005 and the Y-direction individual stretched pattern 2006 are repeatedly arranged in the Y direction and the X direction, respectively, and the X-direction individual stretched pattern 2005 intersects the Y-direction individual stretched pattern 2006 at an intersection point K2, where the intersection point K2 does not intersect with both the X-direction "lantern type" pattern and the Y-direction "lantern type" pattern. When stretching in the X direction, the pattern 2005 stretched alone in the X direction relieves the external stress by deformation of the pattern itself, so that a crease is prevented from appearing on the flexible display panel due to stress concentration, and the reliability of the flexible display panel is enhanced. Meanwhile, stretching in the X direction does not affect the Y-direction individual stretched pattern 2006, or has little effect, i.e., the Y-direction individual stretched pattern 2006 is small in amount of deformation. Similarly, when stretching in the Y direction, the Y-direction stretching pattern 2006 relieves the external stress through the deformation of the pattern itself, avoiding the flexible display panel from being folded due to stress concentration, and enhancing the reliability of the flexible display panel. Meanwhile, the stretching in the Y direction does not affect the individual stretched pattern 2005 in the X direction, or has little effect, i.e., the amount of deformation of the individual stretched pattern 2005 in the X direction is small. Compared with a common netted shielding film, the netted shielding film with two independent stretching directions provided by the embodiment has more excellent bending and stretching effects, the extensibility, the contractibility and the bending resistance of the netted shielding film are improved, the shielding film is stretched independently in one direction without influencing the performance of the flexible display panel in the other direction, and the flexible display panel has better stability. Moreover, the flexible display panel provided by the embodiment has the mesh shielding films in two independent stretching directions, and has the capability of relieving bending stress of the shielding film pattern on the basis of the mesh shielding film material corresponding to tensile deformation, so that the reliability of the flexible display panel is improved. Meanwhile, the shielding film of the flexible display panel provided by the embodiment can ensure the etching uniformity in the process preparation aspect. It should be noted that the shielding film in the flexible display panel provided by the present invention may be formed by fabricating the shielding film on the whole surface, etching the shielding film to form a hollow portion, or by imprinting a pattern, and the method for fabricating the shielding film is not limited.
Fig. 8 is a schematic diagram of a shielding film pattern according to another alternative embodiment of the present invention in a flexible display panel. The shielding film shown in fig. 8 is a mesh-like shielding film having a single stretching pattern only in the Y direction. The individual stretch pattern is a "bow" pattern that is full in the Y direction. Compared with the mesh shielding film in the previous embodiment, the flexible display panel provided by the embodiment has more excellent extensibility and stretchability in a single direction, the extensibility, the contractibility and the bending resistance of the mesh shielding film are improved, and the flexible display panel performance in another direction cannot be influenced by the independent stretching of the shielding film in one direction, so that the flexible display panel has better stability. Moreover, the flexible display panel provided by the embodiment has the mesh shielding film in the independent stretching direction, and has the capability of relieving the bending stress of the shielding film pattern on the basis of the mesh shielding film material corresponding to the tensile deformation, so that the reliability of the flexible display panel is improved. For the flexible display panel that only buckles in one direction, this embodiment can furthest alleviate the stress of buckling, and the better crease phenomenon appears with flexible display panel in avoiding stress concentration, reinforcing flexible display panel's reliability.
Optionally, in the flexible display panel provided by the invention, the shielding film is mainly used for shielding interference of an external electromagnetic signal to the inside of the flexible display panel, wherein the shielding film is made of one or more metals such as copper, silver or iron. The material of the shielding film is not limited to a metal material, and any conductive material may be used.
Optionally, with continued reference to fig. 2 and fig. 3, the flexible display panel further includes an adhesive layer 300, where the adhesive layer 300 is located between the shielding film 200 and the flexible substrate 100, so that the shielding film 200 can be better adhered to the flexible substrate 100, the shielding film and the flexible substrate are prevented from being peeled off, and the flatness of the adhesion is ensured. The adhesive layer 300 may be PET grid adhesive or optical adhesive, but is not limited thereto.
Optionally, the flexible display panel provided by the invention further includes a package structure, and the package structure is located on one side of the display layer away from the array layer.
Fig. 9 is a schematic view of a display device according to an embodiment of the present invention. As shown in fig. 9, the display device includes the flexible display panel provided in any embodiment of the present invention. The display device provided by the invention includes but is not limited to the following categories: the mobile phone comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, a mobile phone, a bracelet only, smart glasses, a vehicle-mounted display, medical equipment, a lighting display, industrial control equipment, a touch interaction terminal and the like.
According to the embodiment, the flexible display panel and the display device provided by the invention at least realize the following beneficial effects:
the flexible display panel provided by the invention comprises the shielding film with the hollow part, the shielding film has certain deformation after being subjected to the action of external force, and the acting force applied to the shielding film can be transmitted, so that the bending stress can be prevented from being excessively concentrated, the ductility of the shielding film can be enhanced, the bending resistance can be improved, the phenomenon that the flexible display panel generates creases is avoided, the shielding film can be ensured to shield electromagnetic signal interference, the peeling phenomenon between the film layers of the flexible display panel can be prevented, and the reliability of the performance of the flexible display panel is ensured.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A flexible display panel, comprising:
a flexible substrate;
the array layer is positioned on the flexible substrate;
the display layer is positioned on one side, away from the flexible substrate, of the array layer and comprises a plurality of light-emitting devices;
the shielding film is positioned on one side of the flexible substrate far away from the array layer;
the flexible display panel comprises a bendable region, and the shielding film is provided with a plurality of hollow parts at least in the bendable region;
the shielding film is a reticular shielding film;
the mesh shielding film has two separate stretching directions, a first stretching direction and a second stretching direction;
the first stretching direction is perpendicular to the second stretching direction;
the mesh shielding film includes a separate stretching pattern in the first stretching direction and a separate stretching pattern in the second stretching direction,
the individual stretching patterns of the first stretching direction and the individual stretching patterns of the second stretching direction are repeatedly arranged in the first stretching direction and the second stretching direction, respectively, and the individual stretching patterns of the first stretching direction and the individual stretching patterns of the second stretching direction intersect to form an intersecting pattern, the intersecting pattern including a hollowed-out shape, wherein the individual stretching patterns of the first stretching direction are a whole piece of 'lantern' pattern, the individual stretching patterns of the second stretching direction are a whole piece of 'lantern' pattern, and the intersecting pattern does not overlap with the 'lantern' pattern.
2. The flexible display panel of claim 1,
the thickness of the shielding film is between 100 μm and 1 mm.
3. The flexible display panel of claim 2,
the shape of the hollow-out part comprises at least one of a diamond shape, a hexagonal shape, a circular shape or an oval shape.
4. The flexible display panel of claim 3,
the size of the hollow-out part is between 0.1mm and 1 cm.
5. The flexible display panel of claim 2,
the flexible display panel is a stretchable display panel.
6. The flexible display panel of claim 1,
the shielding film is made of any one or more of copper, silver, aluminum or iron.
7. The flexible display panel of claim 1,
the flexible display panel further comprises an adhesive layer;
the adhesive layer is located between the shielding film and the flexible substrate.
8. The flexible display panel of claim 7,
the adhesive layer is PET grid double faced adhesive tape or optical adhesive.
9. The flexible display panel of claim 1,
the flexible display panel further comprises a flexible packaging structure;
the flexible packaging structure is located on one side, far away from the array layer, of the display layer.
10. A display device characterized by comprising the flexible display panel according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811517836.3A CN109523921B (en) | 2018-12-12 | 2018-12-12 | Flexible display panel and display device |
| US16/567,099 US10826004B2 (en) | 2018-12-12 | 2019-09-11 | Flexible display panel and display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811517836.3A CN109523921B (en) | 2018-12-12 | 2018-12-12 | Flexible display panel and display device |
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| Publication Number | Publication Date |
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| CN109523921A CN109523921A (en) | 2019-03-26 |
| CN109523921B true CN109523921B (en) | 2021-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811517836.3A Active CN109523921B (en) | 2018-12-12 | 2018-12-12 | Flexible display panel and display device |
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| US (1) | US10826004B2 (en) |
| CN (1) | CN109523921B (en) |
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Also Published As
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|---|---|
| US20200194698A1 (en) | 2020-06-18 |
| CN109523921A (en) | 2019-03-26 |
| US10826004B2 (en) | 2020-11-03 |
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Effective date of registration: 20211109 Address after: No.8, liufangyuan Henglu, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: WUHAN TIANMA MICRO-ELECTRONICS Co.,Ltd. Patentee after: Wuhan Tianma Microelectronics Co.,Ltd. Shanghai Branch Address before: Room 509, building 1, No. 6111, Longdong Avenue, Pudong New Area, Shanghai, 201201 Patentee before: SHANGHAI TIANMA AM-OLED Co.,Ltd. |